Non-POSIX compliant portions of FreeBSD

[Garrett Cooper]

Hi Standards folks,
    I was recently piqued by Warner to look into open_posix_testsuite,
and I've noticed that there are some discrepancies in our compliance
with POSIX standards:

1. We don't implement any of the pieces in errno.h relating to POSIX
STREAMs (I assume this is intentional?). This includes:

- ENODATA
- ENOSR
- ENOSTR
- ETIME

- http://www.opengroup.org/onlinepubs/000095399/basedefs/errno.h.html

2. We don't define daylight or timezone in time.h -
http://www.opengroup.org/onlinepubs/009695399/basedefs/time.h.html
3. We don't define SIGPOLL -
http://www.opengroup.org/onlinepubs/009695399/basedefs/signal.h.html
4. We don't define SCHED_SPORADIC and friends -
http://www.opengroup.org/onlinepubs/000095399/basedefs/sched.h.html
5. We don't define the sched_param struct  -
http://www.opengroup.org/onlinepubs/000095399/basedefs/sched.h.html
6. We don't define bsd_signal (snickers) -
http://www.opengroup.org/onlinepubs/000095399/functions/bsd_signal.html
7. We don't have clock_nanosleep, clock_getcpuclockid, or getdate
defined using the POSIX defined headers.

    I'll keep on providing a full list of items where we aren't POSIX
compliant, but it'd be interesting to get a response about whether or
not the items I submit are known or not, and whether or not they were
conscious design decisions and/or items which need to be fixed.
Thanks,
-Garrett